I've been on the inline CSS hype, it makes rapid prototyping so much faster. Also if you use Dev Tools / Inspect Element to dynamically edit your web frontend its so much easier to test things and then just copy it over.
- If you use something like React, Angular or Vue - use the CLI a loader with "hot reload" so changes in your files are instant and don't interrupt app state. That's the "best" option. - If you're stuck on an old build - set up storybook or just a separate endpoint where hot-reload works/is possible. - Otherwise use the Chrome DevTools "workspaces" feature that lets the Chrome devtools write automatically and update your files - that would save the "copying it over" part and also supports things you'd expect (like source maps).